... a charity that works to preserve and protect historic places and spaces — for ever, for everyone.[2]

The trust owns many heritage properties, including historic houses and gardens, industrial monuments and social history sites. It is one of the largest landowners in the United Kingdom, owning many beauty spots, most of which are open to the public free of charge. It is the largest membership organisation in the United Kingdom, and one of the largest UK charities by both income and assets.